Ambulance Victoria have confirmed that a woman in her 20s has been transported to Ballarat Base Hospital this morning with chest injuries following this morning's collision. She is in a stable condition.
The female driver of the station wagon has been taken to hospital for observation. The other driver was uninjured.
Police believe the station wagon was travelling west onto Creswick Road when it collided with another car.
There has been a two car collision at the Creswick Road overpass in Wendouree this morning.
First reports of the crash came in at 7:50am, with emergency services at the scene at 7:56am.
Ambulance Victoria reports that a woman is trapped in her vehicle, with paramedics attending the scene and assisting.
A witness says he saw a silver Ford territory heading into Ballarat from Creswick collide with an older green Ford Falcon wagon after he came off the Western Freeway overpass.
Traffic is still moving slowly through the area, and drivers are asked to avoid the area if they can.
We will update this developing situation as more information comes to hand.